<!-- App.vue -->
<template>
  <el-container>
    <el-header>书籍管理系统</el-header>
    <el-main>
      <AddBook v-if="currentView === 'add'" />
      <Bookshelf v-else />
    </el-main>
    <!-- 导航逻辑需根据实际需求实现，这里仅示意 -->
    <el-footer>
      <el-button @click="switchView('add')">添加书籍</el-button>
      <el-button @click="switchView('list')">查看书架</el-button>
    </el-footer>
  </el-container>
</template>

<script>
import AddBook from './components/add.vue';
import Bookshelf from './components/bookshelf.vue';

export default {
  components: {
    AddBook,
    Bookshelf
  },
  data() {
    return {
      currentView: 'list' // 初始视图设置为书架列表
    };
  },
  methods: {
    switchView(view) {
      this.currentView = view;
    }
  }
};
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}

nav {
  padding: 30px;
}

nav a {
  font-weight: bold;
  color: #2c3e50;
}

nav a.router-link-exact-active {
  color: #42b983;
}
</style>
<style>
  .el-header, .el-footer {
    background-color: #B3C0D1;
    color: #333;
    text-align: center;
    line-height: 60px;
  }
  
  .el-aside {
    background-color: #D3DCE6;
    color: #333;
    text-align: center;
    line-height: 200px;
  }
  
  .el-main {
    background-color: #E9EEF3;
    color: #333;
    text-align: center;
    line-height: 160px;
  }
  
  body > .el-container {
    margin-bottom: 40px;
  }
  
  .el-container:nth-child(5) .el-aside,
  .el-container:nth-child(6) .el-aside {
    line-height: 260px;
  }
  
  .el-container:nth-child(7) .el-aside {
    line-height: 320px;
  }
</style>